.nav{
    width: 100%; height: 50px; border-top:1px solid #ccc; line-height: 50px;
    position: fixed; bottom:0;right:0;left:0; display: flex; justify-content: space-around; 
    a{display: flex;flex-direction: column;color: #85868a;text-align: center;justify-content: space-around;}
    a.active{color:#fc4554;}z-index: 2;background: #fff;
   }
.nav>a>div:first-of-type{
  font-size: 25px;height: 21px;line-height: 21px;
}
.nav>a>div:last-of-type{
    height: 20px;line-height: 20px;
}